Soil sampling device adopting sand filling method

Abstract

The utility model discloses a sand filling method soil sampling device which comprises a soil sampling piece and a collecting piece, the soil sampling piece and the collecting piece are of a split structure, the soil sampling piece comprises a shell and a spiral soil sampling part, a driving part is arranged in the shell, and the spiral soil sampling part can move downwards along with the shell to be screwed into a soil body so as to sample a soil sample and form a sand filling test pit. A containing cavity is formed in the collecting piece, and the spiral soil taking part can penetrate through the collecting piece from top to bottom to be screwed into soil. The shell is pressed downwards to provide downward force for the spiral soil taking part, the driving part only needs to provide rotating acting force for the spiral soil taking part, so that the power needed by the driving part is reduced, and the size of the shell is reduced. The collecting piece restrains the posture that the spiral soil taking part is screwed into the soil body, unstable drilling is avoided, and the taken soil sample can be collected. One soil sampling piece can be used in cooperation with a plurality of collecting pieces, soil taken out by the soil sampling piece is contained in the containing cavities of the collecting pieces, multi-point operation of the soil sampling piece is facilitated, and meanwhile test soil sampling is conducted on multiple points in a field area.

Description

Technical Field

[0001] The utility model belongs to the technical field of soil tests, and particularly relates to a soil sampling device by the sand replacement method. Background Art

[0002] The sand replacement method test is the main method for measuring density at many engineering sites. Its basic principle is to excavate a test pit in the test site area, collect the soil sample in the test pit, and weigh the mass of the soil sample. Standard sand is poured into the test pit, and the volume of the test pit is calculated by the mass of the poured standard sand. The soil density can be deduced through the soil sample mass and the test pit volume.

[0003] During the soil sampling process of the sand replacement method test, a telescopic soil sampling drill is generally used for soil sampling. The telescopic soil sampling drill includes a housing, a spiral drill rod and a driving part, and the spiral drill rod can slide into and out of the housing relatively. When in use, the housing abuts against the ground, and the driving part drives the spiral drill rod to rotate and slide downward out of the housing, so that the spiral drill rod drills into the ground for soil sampling. The power for driving the spiral drill rod to rotate and move downward into the ground is provided by the driving part, and the driving part requires a large amount of power, reducing the battery life of the telescopic soil sampling drill. In addition, a slideway for the spiral drill rod to slide into and out of needs to be arranged in the housing, resulting in an increase in the size of the housing, which is not convenient for the use and storage of the telescopic soil sampling drill.

[0004] When using a semi-fixed soil sampling drill for soil sampling, in the initial stage of soil sampling, only the spiral drill rod contacts the ground, and the contact area is small, which easily leads to inaccurate drilling direction of the spiral drill rod in the soil body. When the spiral drill rod shakes horizontally during drilling, it is easy to disturb the surrounding soil body, or when the spiral drill rod drills obliquely into the soil body, the side wall of the formed test pit has an inverse slope inclination, that is, the side wall of the test pit extends upward and inward into the test pit, and the soil body on the upper side of the side wall of the test pit is supported weakly and is more likely to fall into the test pit. If the soil body is disturbed or falls into the test pit, the soil structure becomes loose, occupying part of the test pit volume, resulting in inaccurate measurement of the test pit volume in the sand replacement method test. Summary of the Utility Model

[0005] The utility model provides a soil sampling device by the sand replacement method to solve the problems of high power consumption, large size and inconvenient use and storage caused by using a telescopic soil sampling drill for soil sampling, as well as the problems of difficult control of the soil sampling drilling direction and resulting in soil disturbance and inaccurate measurement of the test pit volume after the spiral drill rod and the housing are semi-fixed.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A sand replacement method soil sampling device, comprising a soil sampling member and a collection member. The soil sampling member and the collection member are of a split structure. The soil sampling member includes a housing and a spiral soil sampling part with at least part of the area exposed outside the housing. A driving part is arranged inside the housing to drive the spiral soil sampling part to rotate relative to the housing. The spiral soil sampling part can rotate into the soil body as the housing moves downward to take soil samples and form a sand replacement test pit. The collection member has a receiving cavity for receiving the soil samples taken by the soil sampling member. The spiral soil sampling part can penetrate through the collection member from top to bottom to rotate into the soil body.

[0008] The sand replacement method soil sampling device of the present utility model further has the following additional technical features:

[0009] The collection member is of a shell structure, including an upper wall, a lower wall and a side wall. The upper wall is provided with a first collection hole for the spiral soil sampling part to pass through. The lower wall is provided with a second collection hole corresponding to the first collection hole. The spiral soil sampling part can sequentially pass through the first collection hole and the second collection hole to rotate into the soil body in the vertical direction.

[0010] The edge of the second collection hole extends upward to form a shielding flange. At least part of the upper end surface of the shielding flange extends radially outward along the second collection hole and inclines downward to form a guiding inclined surface surrounding the second collection hole.

[0011] At least one collection rib is arranged on the first collection hole. One end of the collection rib is fixed to the inner wall of the edge of the first collection hole, and the other end extends into the first collection hole and inclines downward.

[0012] When the spiral soil sampling part moves downward and rotates into the soil body, the rotation direction relative to the housing is the first direction. The collection rib extends from the edge of the first collection hole into the first collection hole along the first direction obliquely. One end of the collection rib located in the first collection hole abuts against the rod body of the spiral soil sampling part.

[0013] The collection member further includes a first sealing part cooperating with the first collection hole and a second sealing part cooperating with the second collection hole to realize the sealing of the receiving cavity.

[0014] At least part of the side wall of the collection member is of an elastic sheet structure. The elastic direction of the elastic sheet structure is the vertical direction. The elastic sheet structure continuously surrounds the axis of the collection member for one week.

[0015] The spiral soil sampling part includes a rod body and a spiral body surrounding the rod body. The height of the spiral body protruding radially relative to the rod body gradually decreases from top to bottom.

[0016] The upper end surface of the housing is provided with an upper end plate for closing the space inside the housing, and the upper end plate is provided with operating handles fixed to both sides of the housing and extending in the radial direction.

[0017] The driving part can drive the spiral soil-taking part to rotate relative to the housing. When the spiral soil-taking part moves downward and rotates into the soil, the rotation direction is the first direction, and when the spiral soil-taking part moves upward and disengages from the soil, the rotation direction is the second direction, and the first direction is opposite to the second direction.

[0018] Due to the adoption of the above technical solutions, the beneficial effects obtained by the present utility model are as follows:

[0019] 1. In the present utility model, the soil-taking member includes a housing and a spiral soil-taking part with at least part of the area exposed outside the housing. The soil-taking member is a semi-fixed soil boring tool. A driving part is arranged inside the housing to drive the spiral soil-taking part to rotate relative to the housing. The spiral soil-taking part is in a fixed state axially relative to the housing, and the spiral soil-taking part is always in an exposed state relative to the housing and cannot slide axially relative to the housing. The driving part drives the spiral soil-taking part to rotate, presses down the housing to make the housing move downward, thereby driving the spiral soil-taking part to move downward and rotate into the soil. When using the sand replacement method soil-taking device, a downward force is provided for the spiral soil-taking part by pressing down the housing. The driving part only needs to provide a rotational acting force for the spiral soil-taking part, which can reduce the power consumed by the driving part, thereby improving the battery life of the soil-taking member. In addition, it also avoids setting a slideway in the housing for the spiral soil-taking part to slide in or out, reduces the size of the housing, reduces the size of the soil-taking member, and makes the soil-taking member more convenient to operate and store.

[0020] The spiral soil sampling part penetrates through the collecting part from top to bottom and spirally enters the soil body. The collecting part restricts the posture of the spiral soil sampling part when it enters the soil body, reducing the drilling instability caused by only the spiral soil sampling part contacting the soil body when using a semi-fixed soil sampling tool, reducing the disturbance to the soil body when the spiral soil sampling part enters the soil body, and reducing the cohesion reduction and sliding of the soil on the side wall of the test pit into the test pit after the spiral soil sampling part leaves the soil body, thereby avoiding inaccurate measurement of the test pit volume by the sand replacement method and improving the test accuracy of the sand replacement method. After the spiral soil sampling part leaves the soil body, the soil particles it carries are accommodated in the accommodation cavity, which can reduce the cumbersome operation of collecting the soil particles again, reduce the exposure time of the soil particles, avoid the evaporation of moisture in the soil particles, and improve the accuracy of measuring the quality of the soil particles. Moreover, the soil sampling part and the collecting part are of a split structure. One soil sampling part can be used in combination with multiple collecting parts. The soil taken out by the soil sampling part is accommodated in the accommodation cavity of the collecting part. The collecting part also serves as a transfer container for transporting the collected soil, and is also convenient for the soil sampling part to perform multi-point operations and conduct tests at multiple points in the site area.

[0021] 2. As a preferred embodiment of the present invention, the edge of the second collecting hole extends upward to form a shielding flange. At least part of the upper end surface of the shielding flange extends radially outward and downward along the second collecting hole to form a guiding inclined surface surrounding the second collecting hole. The shielding flange shields the soil particles in the accommodation cavity, and can prevent the soil particles in the accommodation cavity from entering the test pit through the second collecting hole, avoiding inaccurate measurement of the test pit volume caused by excessive scattered soil particles in the test pit. In addition, the soil particles falling from above onto the guiding inclined surface fall into the accommodation space under the guiding action of the guiding inclined surface. The guiding inclined surface guides the falling direction of the soil particles, and can prevent the soil particles from further falling into the test pit through the second collecting hole.

[0022] 3. As a preferred embodiment of the present utility model, when the spiral soil-extracting part moves downward and is screwed into the soil, the rotation direction relative to the outer shell is a first direction, and the collecting ribs extend obliquely along the first direction from the mouth of the first collecting hole into the first collecting hole, and one end of the collecting ribs located in the first collecting hole abuts against the rod body of the spiral soil-extracting part. When the spiral soil-extracting part is screwed into the first collecting hole from top to bottom, the rod body abuts against the collecting ribs, and the friction force generated by the rod body on the collecting ribs is a pulling force along the length direction of the collecting ribs, which can prevent the collecting ribs from wrapping around the spiral soil-extracting part and hindering the penetration of the spiral soil-extracting part, and the collecting ribs have a stronger ability to withstand pulling force, which can avoid the compression and folding damage caused by the collecting ribs. In addition, when the spiral soil extracting part carries soil particles from the bottom to the top and leaves the soil body, the collecting ribs clean the soil particles in the spiral soil extracting part, pushing the soil particles to leave the spiral soil extracting part in the radial outward direction of the spiral soil extracting part, thereby being stored in the accommodating cavity and avoiding falling vertically downward into the test pit through the second collecting hole. It can also avoid inaccurate soil sample quality measurement caused by soil particles remaining in the spiral soil extracting part without being collected.

[0023] 4. As a preferred embodiment of the present invention, at least part of the side wall of the collecting member is an elastic sheet structure, the elastic direction of the elastic sheet structure is the vertical direction, and the elastic sheet structure continuously surrounds the axis of the collecting member. During the soil-taking process of the soil-taking member, the outer shell can move downward to squeeze the collecting member, and the elastic sheet structure is compressed, which can reduce the distance between the upper wall and the lower wall of the collecting member, reduce the height of the collecting member, and reduce the length of the part of the spiral soil-taking part located in the accommodating chamber, thereby reducing the length of the spiral soil-taking part and reducing the size of the soil-taking member, which is convenient for the use and storage of the soil-taking member. When the soil-taking member has finished taking soil and stops driving downward, it is necessary to provide an upward pulling force to separate the soil particles in the spiral soil-taking part from the soil body, so that the spiral soil-taking part can take the soil particles away from the soil body. The soil particles in the spiral soil-taking part and the soil particles in the surrounding soil body generally have a strong cohesive force, and the upward pulling force required to drive the soil-taking member is relatively large. The elastic sheet structure can provide an upward elastic force for the outer shell, making it easy to remove the spiral soil-taking part from the soil body, so that the operation of the soil-taking device using the sand-filling method is more labor-saving and convenient.

[0024] 5. As a preferred embodiment of the present utility model, the spiral soil taking part includes a rod body and a spiral body surrounding the rod body, and the height of the spiral body protruding radially relative to the rod body gradually decreases from top to bottom. The height of the spiral body at the lower end is smaller, so as to facilitate driving the spiral soil taking part to rotate into the soil from top to bottom, and at the same time, it can also reduce the disturbance of the spiral soil taking part to the surrounding soil. Since the height of the spiral body gradually decreases from top to bottom, the horizontal cross-section of the test pit formed after the spiral soil taking part takes soil gradually decreases from top to bottom, and the pit wall of the test pit is an inclined slope. The soil below the pit wall forms a supporting effect on the soil above, reducing the collapse of the soil above the test pit and falling into the test pit, and improving the accuracy of the volume measurement of the test pit by the sand filling method. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present utility model and constitute a part of the present utility model. The schematic embodiments and descriptions thereof are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0026] Figure 1 is a schematic structural diagram of the soil taking member under an embodiment of the present utility model;

[0027] Figure 2 is a vertical sectional view of the collecting member under an embodiment of the present utility model;

[0028] Figure 3 is a bottom view of the upper wall under an embodiment of the present utility model.

[0029] Wherein:

[0030] 1. Soil taking member; 11. Outer shell; 12. Spiral soil taking part; 121. Spiral body; 122. Rod body; 13. Driving part; 14. Upper end plate; 15. Operating handle;

[0031] 2. Collecting member; 21. Accommodating cavity; 22. Upper wall; 221. First collecting hole; 222. Collecting rib; 23. Lower wall; 231. Second collecting hole; 232. Blocking flange; 233. Guiding slope; 24. Side wall; 241. Elastic sheet structure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] In order to more clearly illustrate the overall concept of the present utility model, the following will be described in detail by way of examples in conjunction with the drawings of the specification.

[0033] Many specific details are set forth in the following description in order to provide a thorough understanding of the present utility model. However, the present utility model may be implemented in other ways different from those described herein. Therefore, the protection scope of the present utility model is not limited by the specific embodiments disclosed below.

[0034] In addition, in the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "top", "bottom", "inner", "outer", "axial direction", "radial direction", "circumferential direction", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0035] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0036] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. In the description of this specification, the description with reference to terms such as "embodiment", "example", "an embodiment", "example", or "specific example", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0037] As Figure 1 and Figure 2 shown, a soil sampling device by sand pouring method includes a soil sampling member 1 and a collection member 2. The soil sampling member 1 and the collection member 2 are of a split structure. The soil sampling member 1 includes a housing 11 and a spiral soil sampling part 12 with at least part of the area exposed outside the housing 11. A driving part 13 is arranged inside the housing 11 to drive the spiral soil sampling part 12 to rotate relative to the housing 11. The spiral soil sampling part 12 can rotate into the soil body as the housing 11 moves downward to take soil samples and form a sand pouring test pit. The collection member 2 has a receiving cavity 21, and the receiving cavity 21 is used to receive the soil samples taken by the soil sampling member 1. The spiral soil sampling part 12 can penetrate through the receiving cavity 21 from top to bottom to rotate into the soil body.

[0038] It should be noted that the soil sampling device using the sand replacement method in the present utility model is applicable to the sand replacement method experiment in geotechnical tests. In the sand replacement method test, soil is sampled from the test point by the sampling device, and at the same time, a test pit is formed. Then, standard sand is poured into the test pit to calculate the volume of the test pit through the mass and density of the standard sand, and the soil density is converted by combining the sampled soil mass measured.

[0039] The soil sampling member 1 includes a housing 11 and a spiral soil sampling part 12 with at least part of the area exposed outside the housing 11. The soil sampling member 1 is a semi-fixed soil drill, that is, a driving part 13 is arranged in the housing 11 to drive the spiral soil sampling part 12 to rotate relative to the housing 11. The spiral soil sampling part 12 is in a fixed state axially relative to the housing 11, and the spiral soil sampling part 12 is always in an exposed state relative to the housing 11 and cannot slide axially relative to the housing 11. The driving part 13 drives the spiral soil sampling part 12 to rotate and presses down the housing 11 to make the housing 11 move downward, thereby driving the spiral soil sampling part 12 to move downward and rotate into the soil body. When using the soil sampling device with the sand replacement method, a downward force is provided for the spiral soil sampling part 12 by pressing down the housing 11, and the driving part 13 only needs to provide a rotational force for the spiral soil sampling part 12, which can reduce the power consumed by the driving part 13, thereby improving the endurance of the soil sampling member 1. In addition, it also avoids setting a slideway in the housing 11 for the spiral soil sampling part 12 to slide in or out, reducing the size of the housing 11 and the size of the soil sampling member 1, making the soil sampling member 1 more convenient to operate and store.

[0040] The spiral soil sampling part 12 penetrates through the collection member 2 from top to bottom and rotates into the soil body. The collection member 2 forms a constraint on the attitude of the spiral soil sampling part 12 when it rotates into the soil body, reducing the drilling instability caused by only the spiral soil sampling part 12 contacting the soil body when using a semi-fixed soil drill, reducing the disturbance of the spiral soil sampling part 12 to the soil body when it rotates into the soil body, and reducing the cohesion reduction and sliding of the soil on the side wall of the test pit into the test pit after the spiral soil sampling part 12 is separated from the soil body, thereby avoiding inaccurate measurement of the test pit volume by the sand replacement method and improving the accuracy of the sand replacement method test. When the soil on the side wall of the test pit falls into the test pit, the soil is disturbed and freely scattered in the test pit, the volume of the soil increases, the volume of the test pit measured by the sand replacement method decreases, and further the measured soil density increases, resulting in deviation of the sand replacement method test results.

[0041] After the spiral soil-taking part 12 leaves the soil body, the carried soil particles are accommodated in the accommodation cavity 21, which can reduce the cumbersome operation of collecting the soil particles again, and can reduce the exposure time of the soil particles, avoid the evaporation of water in the soil particles, and improve the accuracy of measuring the quality of the soil particles. Moreover, the soil-taking member 1 and the collecting member 2 are of a split structure, and one soil-taking member 1 can be used in combination with multiple collecting members 2. The soil body taken out by the soil-taking member 1 is accommodated in the accommodation cavity 21 of the collecting member 2. The collecting member 2 also serves as a transfer container for transferring the collected soil body, and is also convenient for the soil-taking member 1 to perform multi-point operations and conduct tests at multiple points in the field area.

[0042] As a preferred embodiment of the present invention, as Figure 2 shown, the collecting member 2 is of a shell structure. The collecting member 2 includes an upper wall 22, a lower wall 23 and a side wall 24. The upper wall 22 is provided with a first collecting hole 221 for the spiral soil-taking part 12 to pass through, and the lower wall 23 is provided with a second collecting hole 231 corresponding to the first collecting hole 221. The spiral soil-taking part 12 can sequentially pass through the first collecting hole 221 and the second collecting hole 231 to rotate vertically into the soil body. Both the first collecting hole 221 and the second collecting hole 231 are circular and are arranged vertically corresponding to each other. The spiral soil-taking part 12 sequentially passes through the first collecting hole 221 and the second collecting hole 231 from top to bottom and drills into the soil body. The first collecting hole 221 and the second collecting hole 231 limit the drilling posture of the spiral soil-taking part 12, so that the spiral soil-taking part 12 vertically drills into the soil body. This can avoid the spiral soil-taking part 12 from shaking and disturbing the soil body during the process of rotating downward into the soil body. In addition, it can also avoid the test pit formed after the spiral soil-taking part 12 is inclined and rotated into the soil body from extending obliquely. Some areas of the side wall of the test pit form an inverse slope inclination. On the side facing the inside of the test pit, the slope formed by the side wall of the test pit and the horizontal plane has an angle less than 90°, that is, the side wall of the test pit extends obliquely upward into the test pit, and the soil body on the upper side of the side wall of the test pit is more likely to fall into the test pit.

[0043] In addition, the soil particles accommodated in the accommodation cavity 21 are surrounded and shielded by the upper wall 22, the lower wall 23 and the side wall 24, and can only communicate with the outside through the first collecting hole 221 and the second collecting hole 231, reducing the directly exposed area of the collected soil particles, reducing the reduction of the measured quality caused by the evaporation of water in the soil particles, and improving the accuracy of the measurement result of the sand replacement method test.

[0044] As an embodiment under this embodiment, as Figure 2As shown, at least one collecting rib 222 is provided in the first collecting hole 221. One end of the collecting rib 222 is fixed to the inner wall of the mouth edge of the first collecting hole 221, and the other end extends into the first collecting hole 221 and inclines downward. The collecting rib 222 is a strip structure made of steel bars or plastics, and the collecting rib 222 can be bent and deformed under pressure. Preferably, as Figure 3 shown, the distance from the end of the collecting rib 222 facing the inside of the first collecting hole 221 to the axis of the first collecting hole 221 is r 1 , and the radius of the rod body 122 of the spiral soil-taking part 12 along the radial direction is r 2 , 0 < r 1 ≤ r 2 . When the spiral soil-taking part 12 passes downward through the first collecting hole 221, the rod body 122 presses the collecting rib 222, causing the collecting rib 222 to deform to avoid the rod body 122. The collecting rib 222 can interfere with the soil particles carried by the spiral soil-taking part 12, so as to facilitate the shedding of the soil particles from the spiral soil-taking part 12. One end of the collecting rib 222 is fixed to the inner wall of the mouth edge of the first collecting hole 221, and the other end extends into the first collecting hole 221 and inclines downward. The collecting rib 222 inclines toward the inside of the accommodating cavity 21, and interferes with and causes the shedding of the soil mass carried by the spiral soil-taking part 12 in the accommodating cavity 21, preventing the spiral soil-taking part 12 from carrying the soil particles away from the accommodating cavity 21, and making the soil particles fall off onto the upper end surface of the upper wall 22, so as to reduce the operation of re-collecting the soil particles.

[0045] Preferably, as Figure 3 shown, when the spiral soil-taking part 12 moves downward and rotates into the soil body, the rotation direction relative to the outer shell 11 is the first direction. The collecting rib 222 extends obliquely along the first direction from the mouth edge of the first collecting hole 221 into the first collecting hole 221. One end of the collecting rib 222 located in the first collecting hole 221 abuts against the rod body 122 of the spiral soil-taking part 12. When the spiral soil-taking part 12 rotates downward into the first collecting hole 221, the rod body 122 abuts against the collecting rib 222, and the frictional force generated by the rod body 122 on the collecting rib 222 is a pulling force along the length direction of the collecting rib 222, which can prevent the collecting rib 222 from winding around the spiral soil-taking part 12 and causing an obstacle to the penetration of the spiral soil-taking part 12, and the collecting rib 222 can bear the pulling force stronger, which can prevent the collecting rib 222 from being damaged by crushing.

[0046] In addition, when the spiral soil-taking part 12 carries soil particles and separates from the soil mass from bottom to top, the collecting ribs 222 clean the soil particles in the spiral soil-taking part 12, pushing the soil particles to separate from the spiral soil-taking part 12 in the direction radially outward of the spiral soil-taking part 12, so as to be stored in the accommodating cavity 21, avoiding falling vertically downward through the second collecting hole 231 into the test pit, and also avoiding inaccurate measurement of the soil sample quality caused by soil particles remaining in the spiral soil-taking part 12 without being collected. When the spiral soil-taking part 12 separates from the soil mass from bottom to top, the rotation direction of the spiral soil-taking part 12 is the second direction, which is opposite to the first direction. As Figure 1 shown, when observing the soil-taking member 1 from bottom to top, the spiral body 121 spirally winds around the rod body 122 in the counterclockwise direction from top to bottom. The first direction is the counterclockwise direction, and the second direction is the clockwise direction. The soil particles carried in the spiral soil-taking part 12 generate a movement along the collecting ribs 222 and move in the direction away from the axis of the rod body 122, so that the soil particles separate from the spiral soil-taking part 12, and it can also avoid the soil particles falling into the second collecting hole 231.

[0047] As an embodiment under this embodiment mode, as Figure 2 shown, the edge of the second collecting hole 231 extends upward to form a shielding flange 232. At least part of the upper end surface of the shielding flange 232 extends radially outward and downward along the second collecting hole 231 to form a guiding inclined surface 233 surrounding the second collecting hole 231. The shielding flange 232 shields the soil particles in the accommodating cavity 21, and can avoid the soil particles in the accommodating cavity 21 entering the test pit through the second collecting hole 231, and avoid inaccurate measurement of the test pit volume caused by excessive scattered soil particles in the test pit. At the same time, the shielding flange 232 forms a through channel, and the spiral soil-taking part 12 passes through the through channel and then screws into the soil mass. The shielding flange 232 further strengthens the constraint on the direction of the spiral soil-taking part 12 screwing into the soil mass.

[0048] In addition, the soil particles falling from above to the guiding inclined surface 233 fall into the accommodating space under the guiding action of the guiding inclined surface 233. The guiding inclined surface 233 guides the falling direction of the soil particles, and can avoid the soil particles further falling into the test pit through the second collecting hole 231.

[0049] As a preferred embodiment of the present utility model, the collecting member 2 further includes a first sealing portion cooperating with the first collecting hole 221 and a second sealing portion cooperating with the second collecting hole 231 to achieve the sealing of the accommodating cavity 21. The first sealing portion cooperates with the first collecting hole 221 for sealing, and the second sealing portion cooperates with the second collecting hole 231 for sealing, realizing the sealing of the collecting member 2. The collecting member 2 can be used as a transfer container to transfer the collected soil particles, and the operation of transferring the soil particles from the collecting member 2 to the transfer container can be avoided. This can not only prevent the soil particles from evaporating moisture through the first collecting hole 221 and the second collecting hole 231, avoiding inaccurate measurement of the quality of the soil particles, but also prevent the soil particles from scattering outside the collecting member 2 from the first collecting hole 221 and the second collecting hole 231 during transportation. Specifically, both the first sealing portion and the second sealing portion are plugs, and are inserted into the first collecting hole 221 and the second collecting hole 231 to achieve sealing.

[0050] Preferably, as Figure 2 shown, at least a part of the side wall 24 of the collecting member 2 is an elastic sheet structure 241. The elastic direction of the elastic sheet structure 241 is the vertical direction, and the elastic sheet structure 241 continuously surrounds the axis of the collecting member 2 for one week. During the soil sampling process of the soil sampling member 1, the outer shell 11 can move downward to squeeze the collecting member 2, and the elastic sheet structure 241 is compressed, which can reduce the distance between the upper wall 22 and the lower wall 23 of the collecting member 2, reduce the height of the collecting member 2, so as to reduce the length of a part of the spiral soil sampling portion 12 located in the accommodating cavity 21, thereby reducing the length of the spiral soil sampling portion 12 and the size of the soil sampling member 1, facilitating the use and storage of the soil sampling member 1. When the soil sampling member 1 finishes sampling and stops driving downward, at this time, an upward pulling force needs to be provided to separate the soil particles in the spiral soil sampling portion 12 from the soil mass, facilitating the spiral soil sampling portion 12 to carry the soil particles away from the soil mass. Generally, there is a strong cohesion between the soil particles in the spiral soil sampling portion 12 and the soil particles in the surrounding soil mass, and the upward pulling force required to drive the soil sampling member 1 is relatively large. The elastic sheet structure 241 can provide an upward elastic force for the outer shell 11, facilitating the removal of the spiral soil sampling portion 12 from the soil body, making the operation of the sand replacement method soil sampling device more labor-saving and convenient.

[0051] As a preferred embodiment of the present utility model, as Figure 1As shown, the spiral soil extracting part 12 includes a rod body 122 and a spiral body 121 surrounding the rod body 122, and the height of the spiral body 121 protruding radially relative to the rod body 122 gradually decreases from top to bottom. The spiral body 121 at the lower end is relatively small in height, so it is easy to drive the spiral soil extracting part 12 to rotate into the soil from top to bottom, and at the same time, it can also reduce the disturbance of the spiral soil extracting part 12 to the surrounding soil. The height of the spiral body 121 gradually decreases from top to bottom, and the horizontal cross-section of the test pit formed after the spiral soil extracting part 12 extracts soil gradually decreases from top to bottom. The pit wall of the test pit is an inclined slope, and the soil on the lower side of the pit wall supports the soil on the upper side, reducing the collapse of the soil on the upper side of the test pit and falling into the test pit, thereby improving the accuracy of the sand filling method for measuring the volume of the test pit.

[0052] Preferably, Figure 1 As shown, the upper end surface of the shell 11 is provided with an upper end plate 14 for closing the space inside the shell 11, and the upper end plate 14 is provided with operating handles 15 extending in the radial direction and fixed on both sides of the shell 11. The operating handle 15 located on the upper side of the upper end plate 14 is convenient for manipulating the soil-extracting member 1. Pressing down the operating handle 15 is convenient for providing axial downward pressure for the soil-extracting member 1, controlling the soil-extracting posture of the soil-extracting member 1, so that the soil-extracting member 1 drills downward in the vertical direction to extract soil. The two ends of the operating handle 15 are respectively fixed on both sides of the radial direction of the shell 11, and there is an operating gap between the operating handle 15 and the upper end plate 14. Part of the palm can penetrate into the operating gap to hold the operating handle 15, which is more convenient for operating the soil-extracting member 1 through the operating handle 15.

[0053] Preferably, the driving part 13 can drive the spiral soil extracting part 12 to rotate relative to the housing 11, and the spiral soil extracting part 12 rotates in a first direction when it moves downward and screws into the soil body, and rotates in a second direction after it moves upward and leaves the soil body, and the first direction is opposite to the second direction. When the spiral soil extracting part 12 moves downward and screws into the soil body to extract soil, the spiral soil extracting part 12 rotates along the first direction to facilitate screwing soil particles into the spiral soil extracting part 12, so that the spiral soil extracting part 12 takes the soil particles away from the soil body. When the spiral soil extracting part 12 moves upward and leaves the soil body, the spiral soil extracting part 12 rotates along the second direction to facilitate separating soil particles from the spiral soil extracting part 12 for collecting soil particles.

[0054] Specifically, Figure 1 and Figure 3As shown, from the perspective of looking up at the spiral soil-taking part 12 from bottom to top, the spiral body 121 surrounds the rod body 122 in a counterclockwise direction from top to bottom in a circular manner. Moreover, when the spiral soil-taking part 12 moves downward and rotates into the soil for soil-taking, the first direction is the counterclockwise direction, and the second direction is the clockwise direction. When looking up at the collecting rib 222 from bottom to top, the collecting rib 222 extends obliquely into the first collecting hole 221 in a counterclockwise direction.

[0055] In the present utility model, those parts not described can be realized by adopting or referring to the existing technologies.

[0056] Each embodiment in this specification is described in a progressive manner. For the same or similar parts among the embodiments, reference can be made to each other. Each embodiment focuses on the differences from other embodiments.

[0057] The above are only the embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, various modifications and changes can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the scope of the claims of the present utility model.

Claims

1. A soil taking device using a sand filling method, characterized in that: It includes a soil taking piece and a collecting piece, wherein the soil taking piece and the collecting piece are split structures. The soil taking member comprises an outer shell and a spiral soil taking part with at least a part of its area exposed outside the outer shell. A driving part is arranged inside the outer shell to drive the spiral soil taking part to rotate relative to the outer shell. The spiral soil taking part can be rotated into the soil body with the downward movement of the outer shell to take soil samples and form a sand filling test pit. The collecting piece has a containing cavity therein, and the containing cavity is used to contain the soil sample taken by the soil taking piece. The spiral soil taking part can penetrate the collecting piece from top to bottom to be screwed into the soil body.

2. The soil taking device using the sand filling method according to claim 1 is characterized in that: The collecting piece is a shell structure, and includes an upper wall, a lower wall and a side wall. The upper wall is provided with a first collecting hole for the spiral soil taking part to pass through, and the lower wall is provided with a second collecting hole corresponding to the first collecting hole. The spiral soil taking part can pass through the first collecting hole and the second collecting hole in sequence to rotate into the soil body in a vertical direction.

3. The soil-taking device using the sand filling method according to claim 2 is characterized in that: The mouth edge of the second collecting hole extends upward to form a shielding flange, and at least a portion of the upper end surface of the shielding flange extends radially outward along the second collecting hole and tilts downward to form a guiding slope surrounding the second collecting hole.

4. The soil taking device using the sand filling method according to claim 2 is characterized in that: The first collecting hole is provided with at least one collecting rib, one end of which is fixed to the inner wall of the first collecting hole edge, and the other end of which extends into the first collecting hole and tilts downward.

5. The soil taking device using the sand filling method according to claim 4 is characterized in that: When the spiral soil-extracting part moves downward and is screwed into the soil, the rotation direction relative to the outer shell is the first direction, and the collecting rib extends obliquely along the first direction from the mouth of the first collecting hole into the first collecting hole, and one end of the collecting rib located in the first collecting hole abuts against the rod body of the spiral soil-extracting part.

6. The soil-taking device using the sand-filling method according to claim 2, characterized in that: The collecting member further comprises a first sealing portion cooperating with the first collecting hole and a second sealing portion cooperating with the second collecting hole to achieve sealing of the accommodating cavity.

7. The soil-taking device using the sand filling method according to claim 1, characterized in that: At least a part of the side wall of the collecting member is an elastic sheet structure, the elastic direction of the elastic sheet structure is a vertical direction, and the elastic sheet structure continuously surrounds the axis of the collecting member.

8. The soil-taking device using the sand filling method according to claim 1, characterized in that: The spiral soil-extracting part comprises a rod body and a spiral body surrounding the rod body, and the height of the spiral body protruding in the radial direction relative to the rod body gradually decreases from top to bottom.

9. The soil-taking device using the sand-filling method according to claim 1, characterized in that: An upper end plate for closing the space inside the shell is disposed on the upper end surface of the shell, and the upper end plate is provided with operating handles extending in a radial direction and fixed on both sides of the shell.

10. The soil-taking device using the sand filling method according to claim 1, characterized in that: The driving part can drive the spiral soil-extracting part to rotate relative to the outer shell. When the spiral soil-extracting part moves downward and is screwed into the soil, the rotation direction is a first direction. After the spiral soil-extracting part moves upward and leaves the soil, the rotation direction is a second direction. The first direction is opposite to the second direction.

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